In this task you're given a question and you have to paraphrase the question to create the output question while retaining the meaning of the original question.

What is the purpose of zero-ohm resistance?
A resistance of 10 ohm is connected in series with two resistances each of 15 ohm arranged in parallel. What resistance must be shunted across this parallel combination so that the total current taken shall be 1.5A with 20V applied?